Welded rigid frame subway bent and prefabricated bracket



M. P. KORN June 18, 1940.

WELDED RIGID FRAME SUBWAY BENT AND PREFABRICATED BRACKET Filed Sept. 22, 1938 2 Sheets-Sheet 1 INVENTOR. MARTIN P. KO RN ATTORNEY.

June 18, 1940. M. P. KORN '7 2,205,352

WELDED RIGID FRAME SUBWAY BENT AND PREFABRICATED BRACKET Filed Sept. 22, 1938' 2 Sheets-Sheet 2 INVENTOR. U MARTIN P. KORN A TTORNEY.

Patented June 18, 1940 WELDED RIGID 2,205,362 FRAME SUBWAY BENT AND PREFABR-IOATED BRACKET Martin P; Korn, Buffalo, N. Y.

Application September 22, 1938, Serial No. 231,109

4 Claims.

My invention pertains to a weldedsubway bent and method for making the same.

In previous subway construction, subway frames have been provided which were fabricated from rolled shapes or built up members, which were field riveted into bents of which the members, other than columns, have been designed for simple spans. require considerable steel.

It is accordingly-an object of my invention to provide a subway bent having prefabricated brackets welded for joining the corners and interior columns of the frame whereby a structure is provided which is a rigid light weight frame convenient to assemble and erect in the field.

It is also an object of my invention to provide a welded subway bent having one or more brackets or knees making of the bent a rigid frame.

Another object of my invention is to provide a subway bent comprising a welded rigid steel bent of suitable shape and size to accommodate the passage of vehicles or moving objects, having a roof-beam and a side-wall column with ends disposed in adjacent oil-set relation and joined through a prefabricated corner bracket welded between the ends of the column and beam to provide continuity therebetween.

Further objects and advantages are within the scope of my invention, such as relate tothe arrangement and function of the related parts of the structure, to various details of construction and to combinations of parts, elements per se, and to economy and convenience in fabrication and erection and numerous otherfeatures as will be apparent from a consideration of the specification in conjunction with the drawings disclosing specific embodiments of my invention, in which:

Fig. 1 is a cross sectional view of a subway with the concrete broken away showing howmy welded subway bent is constructed and how it is installed;

Figs. 2 and 3 are sectional views taken on lines 2-2 and 33 thereof with the concrete in place around the subway bent; J

Fig. 4 is a cross sectional view of a subway showing another embodiment of my-prefabri-' cated welded brackets; and

Fig. 5 is a. sectional view on line 5-5 thereof. Referring more particularly to Figs. 1, 2and 3 of the drawings, my improved subway bent comprises a side-wall column I, an interior column 3, a roof-beam 5 and a floor-beam 1. These structural elements may be either rolled or built Such constructions are heavy and up members which are selected of suitable lengths to form a bent of a proper size and shape for design of subways. As will be seen, the roofbeam passes above the interior column, terminating above the upper 'end'of the side wall column I in off-set relation. The adjacent. ends of the roof-beam 5 and the side -wall column I are joined rigidly together by welding through a corner bracket or knee 9 which is of a-suitable welded construction made of a suitable size and shape to provide for continuity of stresses and rigidity. p

The corner bracket 9 is of such a construction that it may be prefabricated very advantageously at some remote factory or shop where a large number of the brackets may be turned out in accordance with economical mass production methods. The corner bracket 9 is built up on a corner web plate I I, whichmay be of any suitable shape or outline according to specific design requirements. For this purpose I preferably utilize a corner web plate l! which has an outer corner portion and a diagonal inner bracing edge which extends across the inner corner of the subway bent in bracing relation, as shown at' upper left-hand corner of Fig. 1.

The corner web plate; ll may,' as shown, be of. substantially right triangular shape with the acute vertices of the triangle clipped back to provide abutting edges l2 for engaging structural members. The outer corner of the web plate presents a smoothly rounded curve and a continuous flange l3-is readily applied and welded along the edges and around-the outside of the curved corner of the web plate Without the necessity of making any sharp bends. A flange plate 15' or other rolled section extends along the diagonal inside edge of the corner plate to which it is rigidly welded.v Flange I5 is of sufiicient length to extend across the beam abutting edges I2 of the bracket. The diagonal flange l5 is rigidly welded to the edge of the corner plate along its length, and it imparts strength and rigidity to the fabricated bracket. I 1

To additionally stiffen the corner web plate ll perpendicularly to its surface, elongated stiffener elements l6 may be applied curving over any portion of the plane surface of the plate, to which it is firmly welded in any suitable manner. Under certain conditionsof installation it may ,only

j be necessary ,to stiffen one end portion of the and strength thereon, as shown' on the corner vas field welded joints to a minimum. The'beams and columns for use with the prefabricated brackets are selected of different weights according to the different subway loadings at different locations, and such elements may be. ordered ready cut to proper lengths at mill.

As shown, the end of the floor beam I terminates in off-set relation, below the lower end of the side-wall column and it is rigidly joined thereto by welding to another one of the prefabricated brackets 9, which may be constructed in the fashion previously described, although it may be of a different shape in accordance with the different reqirements of the lower brackets. The term"bracket as used throughout means bracket or knee. The roof beam 6 'passes above the interior column 3, and for joining the roof beam 5 with the upper end. of the interior column 3-I provide a prefabricated interior bracket welded rigidly vtherebetween. The interior bracket I! also is a'construction which may be economically prefabricated by mass production methods.

A form of the interior bracket 1 which may be economically prefabricated comprises, -a web plate l9 which is substantially triangular in shape except that the downwardly projecting apex is sheared off to provide a horizontal lower edge to which a rectangular plate 2| is welded. A stiifener flange23 is welded'rigidly along each downwardly inclined edge of the web plate I9 and at the lower ends to the plate 2|. Extending 'from the rectangular plate 2| up along the'surface of the web plate l9 ,are stiffener elements 25 welded thereto.- The upper edge of the web plate 19 is welded to the lower side of the roofbeam 5 which passes above the interior column. The interior bracket H is prefabricated and welded to the roof-beam 5 "whereby itis only necessary to weld the rectangular plate 2| to the upper end of the interior column 3 in the field. For attachment to the interior bracket, the upper end of the interior column 3, is preferably provided with a corresponding rectangular plate 2'l.to save overhead field welding. The lower plate 21 of this joint is made longer than the upper plate 2| along one. dimension to provide welding edges. The plates 2| and 21 are conveniently fastened together in the-field as by bolting, until the field welding operation is completed.

In Figs. 4 and 5, I have shown another embodiment of my welded subway'bent which comprises side-wall beam |,a floor-beam and interior column or columns 3 similarly to the construction previously described. Also the lower end of the interior column 3 may be welded rigidly on the upper side of the floor-beam 1, as inthat previously described, withbracing cornerplates 29 ,toprovide strength and rigidity.

,;1- However, this embodiment of my subway bent ends: 4 of structural members.

includes an interior bracket 35 comprising a web plate 31 which is of a substantially triangular shape having its vertices sheared or clipped back suitably to provide abutting edges for engaging structural members. The lower apex of the plate 31 is suitably sheared to provide a lower bearing edge 39 extending horizontally for abutting the upper end of the interior column 3. The other two vertices of the triangular plate are so sheared as to provide vertical edges 4| for abutting the ends of short roof-beams 43 which extend from opposite sides of the interior bracket. A flange member 45 is rigidly welded along each edge of edges, and additional stiffening elements may be welded on the surfaces of the web plate if desired.

Obviously the abutting edges 4| are cut to be otherwise than vertical if the roof-beams are not horizontal.

' The short roof-beam 43 extends from the interior bracket 35 toward the outer wall terminating above and short of the side-wall column to which it is rigidly joined through a fabricated corner bracket 41.

In this embodiment of my rigid frame subway bent, the corner bracket 41 comprises a web plate 49 of substantially a right triangular shape having an outer corner portion and an inner diagonal bracing edge portion. The two acute vertices of the triangular plate 49 are clipped back perpendicularly to the outer legs of the triangleto provide suitable bearing edges 5| for abutting the From the square outer corner of the web plate separate. flange members 53 extend along and are welded to each outer edge of the plate49. A flange element 55 is welded along the diagonal edge of the plate.

"One of the clipped edges 5| of the corner web plate is welded to the upper end of the side-wall column and the other clipped edge 5| of the bracket is welded to the adjacent end of the short roof-beam 43. The lower end of the sidewall' column is rigidly joined to the adjacent end of the floor-beam I through a similar corner bracket which is welded therebetween.

' There may be additional interior columns, roof andfloorbeams and interior brackets inaccordance with the number of tunnels to be formed by the rigid. subway bent. As will be understood, theright hand side of the subway bent is closed by a side-wall column (not shown) which is secured rigidly together with the beams in the "same manner as previously disclosed.

weight of steel is accomplished while at the same time the largest portion of the subway bent is completed in factories at considerable saving in fabricating costs due to uniformity of brackets.

The rigid frame subway bents thus constructed,

'in accordance with either embodiment of my invention, are set up in suitable spaced relation with suitable forms (not shown) for receiving the concrete 51 of the subway in reinforcing relation, in 'anywell known manner.

The floor-beams I may be omitted where the foundation soil is of such character that the floor-beams are not required. Where beams deeper than the brackets are" required because of heavier subway loadings,

the standardized brackets adopted for any particularsubway can still be used in conjunction With rolled T sections cut from beams orlwelded thewebplate 31 between the beam abutting- T sections and these T sections imposed upon and welded to the brackets to transmit the stresses from the deeper beams to the brackets.

It is apparent that within the scope of my invention, modifications and different arrangements may be made other than herein disclosed, the term subway is intended to include tunnel, and the present disclosure is illustrative merely, the invention comprehending all variations thereof. a

I claim:

1. A rigid frame subway bent comprising, a roof-beam including a length of beam of stand ard rolled section, a floor-beam comprising a length of beam of standard rolled section, two

outside wall columns formed of standard rolled section, said beams and columns being arranged with their web sections disposed in, a common plane, and having their ends disposed in, adjacent relation but slightly spaced apart and offset, and prefabricated corner brackets disposed between the offset ends of said beams and columns, each of said brackets being formed of a web portion arranged in a common plane with the web portions of said beams and columns and being welded in abutting relation with said web portions to form a substantially rectangular web frame, the edges of said brackets being provided with flanges welded thereto and welded to the flanges and webs on said beams and columns".

2. A corner construction for a subway bent comprising, a beam and a column formed of standard rolled sections having their respective Web sections lying in a common plane and their adjacent ends arranged in spaced and oifset relation, a corner web plate arranged between said adjacent ends in a plane common to the plane of said web sections and being joined to said web sections. of said beam and column by welded joints, a flange welded to the outside edge of said web plate and having its ends welded in abutting relation to the outside flanges on said beam and said column, and a flange welded to the inside edge of said web plate and being welded respectively to the inside flanges on said beam and said column, said last mentioned flange extending to the outside flange and being interposed in. the

slightly spaced apart'and offset, and prefabricated corner brackets disposed between the offset ends of said beams and coliunns, each of said brackets being formed of a web plate arranged in a common plane with the web portions of said beams and columns and being joined to said web portions by welded joints to form a substantially rectangular frame, the outside flanges on adjacent I-beams joined to the same web plate being joined together by a flange welded to said outside flanges and welded to the outside edge of said web plate, an the inside flanges of said adjacent I-beams being joined by a flange welded to said inside flanges and welded to the inside edge of said web plate.

4. A rigid frame subway bent comprising, a substantially rectangular frame formed of pre-fabricated corner brackets joined by straight lengths of standard rolled I-beams having their respective web sections lying in a common plane, said brackets each comprising a corner web plate arranged in the common plane of the web sections of said I-beams and being joined to the web sections of two adjacent I- beams by weldedjoints, the inside flanges on adjacent ends of I-b'eams welded to the same web plate being joined by a flange welded to the inner edge of said web plate,

the outer flanges on adjacent ends of I-beams welded to the same web plate being joined by a flange welded to the outer edge of said web plate, and a center column dividing said frame into two track openings, said column being formed of standard rolled I-beam with its web section arranged in said common plane.

MARTIN P. KQRN. 

